Metabelian SL(n,C) representations of knot groups II: fixed points and deformations
Metabelian SL(n,C) representations of knot groups II: fixed points and deformations
复制标题
结组 II 的 Metabelian SL(n,C) 表示:固定点和变形
DOI:
10.2140/pjm.2011.249.1
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Stefan Friedl
中科院分区:
文献类型:
--
作者:
H. Boden;Stefan Friedl
Given a knot K in an integral homology sphere Σ with exterior NK , there is a natural action of the cyclic group Z/n on the space of SL(n,C) representations of the knot group π1(NK), and this induces an action on the SL(n,C) character variety Xn(NK). We identify the fixed points of this action in X∗ n(NK) with characters of irreducible metabelian representations. We then show that for any irreducible metabelian representation α, we have dimCH(NK ; sl(n,C)ad α) ≥ n− 1. If equality holds, then we prove that the character ξα is a smooth point in Xn(NK) and that there exists an (n− 1)–dimensional family of characters of irreducible SL(n,C) representations of π1(NK) near ξα. We relate the cohomological condition that dimCH(NK ; sl(n,C)ad α) = n − 1 to the vanishing of H1(Σφ), where Σφ denotes the associated metabelian branched cover of Σ branched along K.
DOI:
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发表时间:
2008
期刊:
Kobe Journal of Mathematics 24
影响因子:
--
作者:
Hattori;N.;Miyake;M.;Fumikazu Nagasato
通讯作者:
Fumikazu Nagasato
DOI:
--
发表时间:
2009
期刊:
arXiv
影响因子:
--
作者:
N;Ando;Naoya Ando;Naoya Ando;安藤直也;安藤直也;安藤直也;安藤直也;安藤直也;安藤直也;安藤直也;安藤直也;安藤直也;安藤直也;M. Hirasawa & K. Murasugi
通讯作者:
M. Hirasawa & K. Murasugi